Suction-roller.



C. P. BROWN.

SUCTION ROLLER.

APPLICATION FILED APR. 9, 1914.

l mfifmfim Patented July 6, 1915.

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CURTIS P. BROWN, OF EAST I-TAIVIPTON, CONNECTICUT.

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Specification of Letters Patent.

Patented July 6, 11915.

Application filed April 9, 1914. Serial No. 830,663.

To (ZZZZUILOWL it may concern Be it known that I, CUR'rIs P. BROWN, a citizen of the United States, and a resident of East Hampton, in the county of Middlesex and State of Connecticut, have invented a new and Improved Suction-Roller, of which the following is a full, clear, and exact description.

My invention relates to suction rollers for extracting moisture from paper or fabrics.

An object thereof is to provide an efficient, simple, and inexpensive roller which requires little power for rotation.

Another object of the invention is to provide a suction roller having a suction cham ber of small capacity but of large acting area.

A further object of the invention is to provide a suction roller in which the suction chamber remains substantially invariable, although the rollers forming the chamber vary their relative positions.

A still further object of the invention is to provide a suction roller wherein the sealing rollers forming the suction chamber increase their frictional contact proportion ately to the increase of the suction within the chamber.

Another object of the invention is to prevent the sagging of the central portion of the sealing rollers under the action of the atmosphere.

I attain the above objects by the diagrammatic structure illustrated in the accompanying drawings forming a part of the specification, in which similar characters of reference indicate corresponding parts in all the views and wherein Figure l is a cross section through a suction roller embodying my invention; Fig. 2

is an elevation of the roller partly insection; and Fig. 3 is an end view of the suction roller.

Referring to the drawings, 4 represents a perforated, cylindrical shell the ends of which engage circular recesses 5 of the heads 6, the recess 5 being slightly larger than the exterior diameter of the shell, leaving a lateral displacement to the shell in the heads. Each of the heads 6 is provided with an eccentric hub 7 which forms a bearing for the shaft 8 passing through the heads and shell and the axis of which is parallel to the axis of the shell. A roller 9 is mounted rigidly on the shaft 8 between the heads 6 and,

therefore, the same is placed eccentrioally within the shell 4, as best seen in Figs. 1 and 3. The movement from the bearing roller 9 is transmitted to the perforated shell 4: by means of sealing rollers 10 which frictionally engage theshell and bearing roller and are positioned in the narrower part between the shell and roller, so as to form a suction tion of the eccentric space formed by the shell and bearing roller, as stated, sagging of these rollers under the action of the atmosphere is eliminated. Thus, the length of the suction roller can be greatly increased Without any danger of the sealing roller sagging under the pressure when the vacuum in the suction chamber is increased. Sagging of the rollers is not only injurious to the frictional surface of the sealing rollers, but it greatly reduces the vacuum proper ties of the suction chamber formed by the rollers. Bearings 12 for the rollers 10 are provided in the stationary head which alines the axis'of said sealing rollers parallelly to the axis of the shaft 8 and that of the shell 4C. The bearings 12, as shown in Fig. 3, leave the axis of the rollers freedom to move in an arc, the center of which is in the axis of the bearing roller; and, therefore, it may be said that the sealing rollers are free to roll within predetermined limits onthe hearing roller or are free to float between the shell and bearing roller. It will be also remarked that a displacement of the rollers 10 toward each other will slightly increase the depth of the chamber, that is the dis tance between the bearing roller 9 and the shell 4:; but when the width of the chamber decreases the distance between the sealing rollers will also increase, and, therefore, the capacity of the suction chamber 11 remains substantially unchanged. It will be also noted that the depth of the suction chamber 11 increases from the central part thereof toward the ends, that is, toward the sealing rollers 10. When there is an increase of 6'necessarily displaces the shell 4; and that is the reason why the said shell has a lateral movement in the circular recess 5 engaging.

the ends of the shell.

By the eccentric relative position of the shell and bearing roller, I not only prevent the sagging of the sealing rollers under the action of the atmosphere, but I produce a suction chamber of small capacity having a large area of action and which remains substantiallyinvariable during the relative displacement of the rollers forming said chamber.

The suction end of the pump is connected to an outlet 14: of the chamber formed in one of the heads 6, while the inlet of the chamber is formed by the apertures in the shell located between the sealing rollers 10. A leather gasket 15 is provided in the recess 5 of the head 6 engaging the ends of the shell and that of the sealing roller and hearing roller, sealing the ends of the chamber 11.

From the above it will be seen that I provide a suction roller with an eccentric suction chamber, the sealing rollers of which have a floating movement in the arc, the center of which is in the axis of the bearing roller, and in which roller the relative displacement of the rollers and shell forming the suction chamber leave the suction chamber capacity substantially undisturbed.

termined limits relatively to the bearing roller and in an arc the center of which is in the axis of the bearing roller.

2. In a suction roller, a perforated cylindrical shell, a bearing roller in the shell eccentric therewith, sealing rollers engaging the shell and bearing roller and forming therewith a suction chamber, stationary heads engaging the ends of the shell, bearing roller and sealing rollers and sealing the ends of the suction chamber formed by said shell, sealing and bearing rollers, said sealing rollers having their hearings in said heads and mounted to float within predetermined limits between said shell and bearing roller.

3. In a suction roller, a perforated, cylindrical shell, a bearing roller in the shell eccentric therewith, and sealing rollers mounted to float relatively to each other between the shell and the bearing rollers and forming an eccentric suction chamber with said shell and bearing roller.

4. In a suction roller, a perforated, cylindrical shell mounted to float, a bearing roller in the shell eccentric therewith, and sealing rollers between the shell and the bearing forming a suction chamber, said sealing rollers being mounted to move relatively to each other in an arc the center of which is in the axis of the bearing roller.

5. Int. suction roller, a perforated, cylindrical shell, a bearing roller in the shell eccentric therewith, and floating sealing rollers between the shell and the bearing rollers forming an eccentric suction chamber, said sealing rollers being in the narrow portion of the eccentric space formed by the shell and bearing rollers and adapted to float relatively to each other and to said bearing roller.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CURTIS P. BROWN.

Witnesses:

CLAYTON D. BARTON, FRED H. BARTON.

Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents- Washington, D. G. 

